You need to understand social and cultural context of these shielings or bothys to appreciate the design of this. Traditionally these were huts, located in remote areas with the intention of being open to all who required them, be they hillwalkers, cattle drovers, hunters etc, as a basic but essential means of shelter in case harsh weather conditions.

You would find them on the tops of hills, in remote glens, in the middle of a forest or by rivers. They were intentionally spartan, typically with just a hearth and a raised platform off the ground for sleeping on (you were expected to have your own blanket). As a hillwalker, I can tell you they at a godsend if the weather turns or you are behind schedule on a long walk - anybody exploring Scotland should check them out sometime if you are interested.

As for the Moxon design, it stays true to the spirit of bothys - there is no need for large windows as this is a shelter from the elements, not somewhere to sit for a week to watch the views. If you want to experience the landscape, open the door and go outside. Its spartan, as it should be, but still with wonderful touches of personality that gives it warmth and character. And the design is intentionally robust, which it has to be knowing the harsh weather this place receives.